Alright, let's work through 8019860 times 83004117 step by step
8019860 × 83004117 = 83004117 × (8019860)
+ 83004117 × 0 that is equal 0
+ 83004117 × 60 that results in 4980247020
+ 83004117 × 800 resulting in 66403293600
+ 83004117 × 9000 yielding 747037053000
+ 83004117 × 10000 that results in 830041170000
+ 83004117 × 000000 yielding 0
+ 83004117 × 8000000 which equals 664032936000000

= 665681397763620
